1 /*-
47  * ex_txt --
68 	 * to 0 -- text_init() handles this.)  in ex_txt()
72 		if (TAILQ_NEXT(tp, q) != NULL || tp->lb_len < 32) {  in ex_txt()
76 		tp->len = 0;  in ex_txt()
83 	/* Set the starting line number. */  in ex_txt()
84 	tp->lno = sp->lno + 1;  in ex_txt()
98 	gp = sp->gp;  in ex_txt()
104 			if (v_txt_auto(sp, sp->lno, NULL, 0, tp))  in ex_txt()
114 		/* Deal with all non-character events. */  in ex_txt()
142 		 * (Use tp->len, ignore overwrite and non-printable chars.)  in ex_txt()
144 		BINC_GOTOW(sp, tp->lb, tp->lb_len, tp->len + 1);  in ex_txt()
150 			 * Historically, <carriage-return>'s in the command  in ex_txt()
162 			 * '\' can escape <carriage-return>/<newline>.  We  in ex_txt()
167 			    tp->len != 0 && tp->lb[tp->len - 1] == '\\')  in ex_txt()
177 				tp->lb[tp->len] = '\0';  in ex_txt()
185 			if (LF_ISSET(TXT_DOTTERM) && tp->len == tp->ai + 1 &&  in ex_txt()
186 			    tp->lb[tp->len - 1] == '.') {  in ex_txt()
195 			ntp->lno = tp->lno + 1;  in ex_txt()
198 			 * Reset the autoindent line value.  0^D keeps the ai  in ex_txt()
214 					    OOBLNO, tp, tp->len, ntp))  in ex_txt()
228 			if (tp->len <= tp->ai && LF_ISSET(TXT_AUTOINDENT))  in ex_txt()
232 			if (tp->len <= tp->ai && LF_ISSET(TXT_AUTOINDENT))  in ex_txt()
244 				for (cnt = 0; cnt < tp->len; ++cnt)  in ex_txt()
245 					if (!isblank(tp->lb[cnt]))  in ex_txt()
247 				if (cnt == tp->len) {  in ex_txt()
248 					tp->len = 1;  in ex_txt()
249 					tp->lb[0] = ev.e_c;  in ex_txt()
250 					tp->lb[1] = '\0';  in ex_txt()
262 			 * POSIX 1003.1b-1993, paragraph 7.1.1.9, states that  in ex_txt()
280 			if (!LF_ISSET(TXT_AUTOINDENT) || tp->len == 0)  in ex_txt()
284 				if (tp->len > tp->ai + 1)  in ex_txt()
290 				BINC_GOTOW(sp, ait.lb, ait.lb_len, tp->ai);  in ex_txt()
291 				MEMCPY(ait.lb, tp->lb, tp->ai);  in ex_txt()
292 				ait.ai = ait.len = tp->ai;  in ex_txt()
298 				if (tp->len > tp->ai + 1)  in ex_txt()
302 leftmargin:			(void)gp->scr_ex_adjust(sp, EX_TERM_CE);  in ex_txt()
303 				tp->ai = tp->len = 0;  in ex_txt()
306 				if (tp->len > tp->ai)  in ex_txt()
317 			(void)gp->scr_ex_adjust(sp, EX_TERM_CE);  in ex_txt()
332 			tp->lb[tp->len++] = ev.e_c;  in ex_txt()
346  * txt_prompt --
347  *	Display the ex prompt, line number, ai characters.  Characters had
358 	/* Display the line number. */  in txt_prompt()
360 		(void)ex_printf(sp, "%6lu  ", (u_long)tp->lno);  in txt_prompt()
364 		(void)ex_printf(sp, WVS, (int)tp->ai, tp->lb);  in txt_prompt()
369  * txt_dent --
378 	u_long sw, ts;  in txt_dent()  local
382 	sw = O_VAL(sp, O_SHIFTWIDTH);  in txt_dent()
385 	for (off = scno = 0; off < tp->len; ++off)  in txt_dent()
386 		if (tp->lb[off] == '\t')  in txt_dent()
392 	cno = scno--;  in txt_dent()
393 	scno -= scno % sw;  in txt_dent()
399 	 * number of columns because it's preceded by <space>s.  This is  in txt_dent()
411 	spaces = scno - cno;  in txt_dent()
414 	BINC_RETW(sp, tp->lb, tp->lb_len, tabs + spaces + 1);  in txt_dent()
417 	tp->ai = tabs + spaces;  in txt_dent()
420 	for (tp->len = 0; tabs > 0; --tabs)  in txt_dent()
421 		tp->lb[tp->len++] = '\t';  in txt_dent()
422 	for (; spaces > 0; --spaces)  in txt_dent()
423 		tp->lb[tp->len++] = ' ';  in txt_dent()